Fix the order of HO/reest measurement actions (#1696)

lib/include/srslte/interfaces/ue_interfaces.h

@@ -589,6 +589,8 @@ public:
   virtual void set_config_mbsfn_sib13(const srslte::sib13_t& sib13)                       = 0;
   virtual void set_config_mbsfn_mcch(const srslte::mcch_msg_t& mcch)                      = 0;
 
+  virtual void set_activation_deactivation_scell(uint32_t cmd) = 0;
+
   /* Measurements interface */
   virtual void set_cells_to_meas(uint32_t earfcn, const std::set<uint32_t>& pci) = 0;
   virtual void meas_stop()                                                       = 0;

lib/include/srslte/test/ue_test_interfaces.h

@@ -74,6 +74,7 @@ class phy_dummy_interface : public phy_interface_rrc_lte
   void set_config_mbsfn_sib2(srslte::mbsfn_sf_cfg_t* cfg_list, uint32_t nof_cfgs) {}
   void set_config_mbsfn_sib13(const srslte::sib13_t& sib13) {}
   void set_config_mbsfn_mcch(const srslte::mcch_msg_t& mcch) {}
+  void set_activation_deactivation_scell(uint32_t cmd) {}
 
   /* Measurements interface */
   void set_cells_to_meas(uint32_t earfcn, const std::set<uint32_t>& pci) {}

srsue/hdr/stack/rrc/rrc_meas.h

@@ -45,6 +45,7 @@ public:
   void init(rrc* rrc_ptr);
   void reset();
   bool parse_meas_config(const rrc_conn_recfg_r8_ies_s* meas_config, bool is_ho_reest = false, uint32_t src_earfcn = 0);
+  void  ho_reest_actions(const uint32_t src_earfcn, const uint32_t dst_earfcn);
   void run_tti();
   void update_phy();
   float rsrp_filter(const float new_value, const float avg_value);

srsue/src/stack/rrc/rrc.cc

@@ -2310,6 +2310,9 @@ void rrc::handle_con_reest(const rrc_conn_reest_s& reest)
   // Resume SRB1
   rlc->resume_bearer(1);
 
+  // perform the measurement related actions as specified in 5.5.6.1;
+  measurements->ho_reest_actions(get_serving_cell()->get_earfcn(), get_serving_cell()->get_earfcn());
+
   // Send ConnectionSetupComplete message
   send_con_restablish_complete();
 

srsue/src/stack/rrc/rrc_meas.cc

@@ -90,19 +90,18 @@ bool rrc::rrc_meas::parse_meas_config(const rrc_conn_recfg_r8_ies_s* mob_reconf_
   bool                        ret = true;
   if (mob_reconf_r8->meas_cfg_present) {
     ret = meas_cfg.parse_meas_config(&mob_reconf_r8->meas_cfg, is_ho_reest, src_earfcn);
-  } else {
-    cell_t* serv_cell = rrc_ptr->get_serving_cell();
-    if (serv_cell != nullptr) {
-      // Run 5.5.6.1 if we don't receive Measurement configuration
-      meas_cfg.ho_reest_finish(src_earfcn, serv_cell->get_earfcn());
-    } else {
-      log_h->warning("MEAS:  Could not call ho_reest_finish because serving_cell is null\n");
-    }
+    update_phy();
   }
-  update_phy();
   return ret;
 }
 
+// Section 5.5.6.1 Actions upon handover and re-establishment
+void rrc::rrc_meas::ho_reest_actions(const uint32_t src_earfcn, const uint32_t dst_earfcn)
+{
+  meas_cfg.ho_reest_finish(src_earfcn, dst_earfcn);
+  update_phy();
+}
+
 void rrc::rrc_meas::run_tti()
 {
   std::lock_guard<std::mutex> lock(meas_cfg_mutex);

srsue/src/stack/rrc/rrc_procedures.cc

@@ -1382,7 +1382,7 @@ srslte::proc_outcome_t rrc::ho_proc::init(const asn1::rrc::rrc_conn_recfg_s& rrc
   rrc_ptr->mac->get_rntis(&uernti);
   ho_src_rnti = uernti.crnti;
 
-  // Section 5.3.5.4
+  // Section 5.3.5.4. The implementation of the procedure follows in function step()
   rrc_ptr->t310.stop();
   rrc_ptr->t304.set(mob_ctrl_info->t304.to_number(), [this](uint32_t tid) { rrc_ptr->timer_expired(tid); });
   rrc_ptr->t304.run();
@@ -1480,6 +1480,12 @@ srslte::proc_outcome_t rrc::ho_proc::step()
     rrc_ptr->mac->reset();
     rrc_ptr->phy->reset();
 
+    // configure lower layers to consider the SCell(s), if configured, to be in deactivated state;
+    rrc_ptr->phy->set_activation_deactivation_scell(0);
+
+    // Todo: perform radio configuration when fullConfig is enabled
+
+    // apply the value of the newUE-Identity as the C-RNTI;
     rrc_ptr->mac->set_ho_rnti(recfg_r8.mob_ctrl_info.new_ue_id.to_number(), recfg_r8.mob_ctrl_info.target_pci);
 
     // Apply common config, but do not send to lower layers if Dedicated is present (to avoid sending twice)
@@ -1493,6 +1499,15 @@ srslte::proc_outcome_t rrc::ho_proc::step()
     cell_t* target_cell =
         rrc_ptr->meas_cells.get_neighbour_cell_handle(target_earfcn, recfg_r8.mob_ctrl_info.target_pci);
 
+    // if the RRCConnectionReconfiguration message includes the measConfig:
+    if (not rrc_ptr->measurements->parse_meas_config(&recfg_r8, true, ho_src_cell.get_earfcn())) {
+      Error("Parsing measurementConfig. TODO: Send ReconfigurationReject\n");
+      return proc_outcome_t::error;
+    }
+
+    // perform the measurement related actions as specified in 5.5.6.1;
+    rrc_ptr->measurements->ho_reest_actions(ho_src_cell.get_earfcn(), rrc_ptr->get_serving_cell()->get_earfcn());
+
     Info("Starting cell selection of target cell %s\n", target_cell->to_string().c_str());
 
     if (not rrc_ptr->phy_ctrl->start_cell_select(target_cell->phy_cell, rrc_ptr->ho_handler)) {
@@ -1522,11 +1537,6 @@ srslte::proc_outcome_t rrc::ho_proc::react(ra_completed_ev ev)
     // TS 36.331, sec. 5.3.5.4, last "1>"
     rrc_ptr->t304.stop();
     rrc_ptr->apply_rr_config_dedicated_on_ho_complete(recfg_r8.rr_cfg_ded);
-
-    if (not rrc_ptr->measurements->parse_meas_config(&recfg_r8, true, ho_src_cell.get_earfcn())) {
-      Error("Parsing measurementConfig. TODO: Send ReconfigurationReject\n");
-      ho_successful = false;
-    }
   }
 
   return ho_successful ? proc_outcome_t::success : proc_outcome_t::error;

srsue/test/upper/rrc_meas_test.cc

@@ -54,6 +54,7 @@ public:
   void              set_config_mbsfn_mcch(const srslte::mcch_msg_t& mcch) override {}
   cell_search_ret_t cell_search(phy_cell_t* cell) override { return {}; }
   bool              cell_is_camping() override { return false; }
+  void              set_activation_deactivation_scell(uint32_t cmd) override {}
   bool              cell_select(const phy_cell_t* cell = nullptr) override
   {
     last_selected_cell = *cell;